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A (simple) question on probability that has become confusing

Hi all. This question is in a chapter that involves permutations and combinations and I'm a little thrown by it. I can't work out the answer to c)

i have the following for:

a) 0.50

b) 0.25

c)????

I think c) is just 0.25 as well...but have a feeling I'm wrong...or could have a/b. wrong as well! please help! there are no answers in the back of the book.

many thanks!

Re: A (simple) question on probability that has become confusing

Quote:

Originally Posted by

**flashylightsmeow** Hi all. This question is in a chapter that involves permutations and combinations and I'm a little thrown by it. I can't work out the answer to c)

i have the following for:

a) 0.50

b) 0.25

c)????

I think c) is just 0.25 as well...but have a feeling I'm wrong...or could have a/b. wrong as well! please help! there are no answers in the back of the book.

Is it true that $\displaystyle B\subset A~?$

Re: A (simple) question on probability that has become confusing

Re: A (simple) question on probability that has become confusing

so...does that mean the answer is 0.25?

Re: A (simple) question on probability that has become confusing

Quote:

Originally Posted by

**flashylightsmeow** so...does that mean the answer is 0.25?

Well $\displaystyle A\cap B=B$. So yes.

However, I do find the wording of the question some what odd.

Re: A (simple) question on probability that has become confusing

Agh I know, It's from Paul Newbold and William Carlson's Statistics for Business and Economics...load of absolute cr*p! riddles with mistakes. Thank you very much Plato! No doubt there will be more posts like this in the future!